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https://github.com/obsproject/obs-studio.git
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pkv
e8e04a20c9
This adds: - an ASIO Input source, allowing audio capture of devices using Steinberg ASIO audio SDK on Windows. This allows low latency capture. - an ASIO output, which will allow routing audio from OBS to any ASIO device. A per channel routing is provided. The UI to setup the ASIO output is provided in a later commit. Signed-off-by: pkv <pkv@obsproject.com>
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/******************************************************************************
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Copyright (C) 2022-2026 pkv <pkv@obsproject.com>
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This file is part of win-asio.
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It uses the Steinberg ASIO SDK, which is licensed under the GNU GPL v3.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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#pragma once
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#include <stdbool.h>
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#include <stdint.h>
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#include <string.h>
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typedef struct asio_sample_format {
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int bit_depth;
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int byte_stride;
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bool format_is_float;
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} asio_sample_format;
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bool asio_format_init(asio_sample_format *fmt, long type);
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void asio_format_convert_to_float(const asio_sample_format *fmt, const void *src, float *dst, int samps);
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void asio_format_convert_from_float(const asio_sample_format *fmt, const float *src, void *dst, int samps);
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void asio_format_clear(const asio_sample_format *fmt, void *dst, int samps);
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static inline int16_t ByteOrder_littleEndianShort(const void *p)
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{
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uint16_t v;
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memcpy(&v, p, sizeof(v));
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return (int16_t)v;
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}
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static inline int32_t ByteOrder_littleEndianInt(const void *p)
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{
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uint32_t v;
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memcpy(&v, p, sizeof(v));
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return (int32_t)v;
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}
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static inline int32_t ByteOrder_littleEndian24Bit(const void *p)
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{
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const uint8_t *b = (const uint8_t *)p;
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const int8_t *signed_bytes = (const int8_t *)p;
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return (int32_t)(((uint32_t)signed_bytes[2] << 16) | ((uint32_t)b[1] << 8) | (uint32_t)b[0]);
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}
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static inline void ByteOrder_littleEndian24BitToChars(uint32_t val, void *p)
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{
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uint8_t *b = (uint8_t *)p;
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b[0] = (uint8_t)(val & 0xFF);
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b[1] = (uint8_t)((val >> 8) & 0xFF);
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b[2] = (uint8_t)((val >> 16) & 0xFF);
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}
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